Mixing nozzle



June 28, 1932. p GEER 1,864,647

MIXING Noz ZLE Filed Aug. 17, 1927 /Z' I E A TTORNEY.

Patented June 28, 1,932

1 ,I UNITED STATES PAUL LGEEIa-.or OAKLAND, CALIFORNIA, AssIeNoR, :BYDInEc'r AND IIESNE ASSIGN- h MENTS, or TIIREE-TENTHS '.ro WESLEY M.woo'rEN, or SAN rRANcISco, CALI- FoRNIA, AND @ERBE-TENNIS 'ro LAURAEEN'roN FRANK, or OAKLAND, CALI- ron'NIA My invention relates to anozzle for uniting streams of different. materials, in mixed relal tion,for deliveryin a single stream.

. Anobject of the invention is to provide a nozzle structure-which isparticularly eicient for effecting a thorough mixing of a uid, `such a'semulsiied asphalt, with solidfparticles of a material, such as sand,whereby such particles may become uniformly mixed and coated with theiuid and otherwise function therewith. l

Another object of the inventiongis to pro- Vide a nozzle of the classdescribed whichis non-clogging. A further object of the invention is toprovide a nozzle of the class described Which itself yserves both as ashut-off and control valve `for one of the streams to be united.

A still further object of the invention is to provide a nozzleof'particularly simple structurevwhich may be readily taken apart, andin which, the parts thereof subjected to wear are readily replaceable. y

Other andv ancillary objects of my invention will-be suggested in thefollowing -description and in the use of the device. of myA invention;'Certain of the objects, or certain portions or combinations of theobjects of my 4 invention may be attained with the use of less than allits advantageous features, or with modifications within its purview. Itis petitioned therefore, that my invention be limitthe nozzle taken onthe axial line thereof.

ed only by the claims constitutingits final determination.

' Fig. 5 is a side view of the invention show-` ing the connectingsupply pipes and the de A vice operatively disposedwith .respect to asurface receiving'the discharge therefrom. As herewith illustrated, thenozzle of my erally other.

` MIXING NozzLE Application led August 17, 1927. Serial No. 213,488.

invention, denoted in general by the-numeral 6, includes a body member 7having a shell portion 8 providing a generally frusto-conical cavity-,orchamber 9, and a portion 11 providing a cylindrical bore 12communicating with the cavity 9 at thelarger end thereof and 'coaxiallyrelated thereto. The portion 11 is of somewhat smaller diameter than theadjacent part of the portion 8, and a body portion 13 is accordinglyutilized for connecting said first portions; the portion 13 Abeinggenerally in the form of an annular disc and being preferably formedintegral with the portions 8 and 411, whereby the body 7 constitutes aunitary member.

Mounted in the bore12 to extend forwardly therefrom through the chamber9 to a point beyond the smaller and forward end 14 of the shell 8, is atubular nozzle member 16, such member being preferably of uniform-cross-section and having an axial passage 17 extending therethrough.The member 16 is desirably arranged to be detachably fixed to theynozzle body and is here shown provided at its inner end with a radially-extending annular flange 18, disposable against kthe inner end face 19of the body portion 11 to which it is secured -by means of capscrews 21.

The diameter of the member 16, it will be noted, is somewhat less thanthat of the cavibty 9 at its forward and smallest end wherea passage 22of annular cross-section is defined about-the member 16,-such passagebeing of decreasing 1cross-sectional area toward the forward end 14 ofthe nozzle body.

It will now be noted that streams' of different'materials are arrangedto move genforwardl'y through the passages 17 and 22 and that in ordertoeffect a mixing of the materials of the streams, means must beprovided for directing one stream into the As here shown, the outerstream through' the annularpassage 2 2 is arranged to be deflectedtransversely into the, central stream of the passage 17, and the meansprovided comprises a mixing cap 23 mounted on the forward end of'tlienozzle-portion 8 in threaded engagement with the exterior thereof. Thecap end 24 is disposed forwardly of the end of the member 16 andprovided with surface extending radially outwardly from the inner end ofthe bore- 26 and being arranged for relative engagement with the seat 27when the cap is screwed on the portion 8.'

In this manner, the cap 23 and the end of the nozzle member 16 cooperateto provide a valve; the discharge from which is directed radiallyinwardly between the seat 27 and surface 28 in a flat sheet-like planeinto the stream issuing from the nozzle member 16 whereby a thoroughmixing of the materials of the streams from the passages 17 and 22 isassured, it being particularly noted that because the discharge into thestream from the passage 22 is coplanar and at right angles to the axisof such passage, none of the material from passage 22 is allowed toescape by passing through such stream as might occur were the dischargethereinto oblique.

It .will vnow be noted that if the linner surface of the cap end whichlies radially outwardly of the bearing surface 28 be in generally,coplanar relation with the latter surface, a right-angled 'turn would beimpressed upon material issuing from the passage 22, whereby suchmaterial would impinge against the cap end at right angles thereto, sothat materials having relatively high adhesive and cohesive propertieswould tend to accumulate on such end and clog the passage between theseat 27 and surface 28.

Accordingly, the cap end is formed to provide within it an annulargroove or recess 31 extending forwardly ofthe plane of the surface 28and radially outwardly from the nozzle member 16 beyond the mouth of thepassage 22 whereby a` chamber is defined which lies both in the plane ofthe surface 28 and in the path of discharge from the passage 22.Preferably, the walls of the groove 31 are smooth and present no sharpangles; as here shown, the groove is so shaped that a section thereoftaken in a plane including the nozzle axis comprises an intermediatesemi-circular portion having the diameter thereof intersecting said axisforwardly of the nozzle at an angle of about forty-live degrees and withits center in the plane of Vthe surface 28, and connecting portionsextending tangentially from the intermediate portion in mutuallyparallel relation to'terminate at the surface 28 and the cap threads.llVith.A the groove 31 formed generally as described, no direct impactof material from the passage 22 against the cap is permitted, and thematerial contacting with the surface moves only along (it to keep itscouredclean. The groove 31, forming the chamber that may entrap air,also serves as a cushion t0 smooth out any slight variations 'in thedischarge pressure of material from the outer tion 13.is provided with athreaded perforation for connecting the passage 22 to a second4 hose 33,suitable valves being provided in the respective hose lines as at 34 and36 respectively. l I

The nozzle structure now described is particularly designed for use ineffecting a coating of sand particles with Va cementing material andimmediately and forcibly depositing the coated sand in place, particularreference being had to the use of an emulsified asphaltum as a cementingagent for 'the sand particles. When used for such particular purpose,the sand is supplied to the passage 17 through the hose 32 and iscarried by an air stream in the manner of a sand blast. The cementingmaterial is supplied through the hose 33 to the passage 22 underpressure and in a liquid or atomized form, whence it is delivered intothe sand stream at right angles A amount of cementing material madepossible through adjustment of the mixing cap whereby a mostadvantageous use of material may be effected entirely by adjustment atthe nozzle. It will, of course, be obvious that other granular materialsmay be applied by the use of the nozzle and thata wide variety ofcementing materials may be applied thereby.

In practice, the cap opening 26 is made large enough so that the streamof mixed materials may not Contact with its sides or surface 28 as thestream leaves the nozzle. Furthermore, the layer of materialintersecting the stream through the passage 17 acts to re- Atardsuchstream, whereby` a given pressure connection with the accompanyingdrawing, the advantages ofV the construction and method of operationwill be readily understood by those skilled in the art to which theinvention appertains, and while I have described the principle ofoperation, together with the device which I now consider to be the bestembodiment thereof, I desire to have it understood that the device shownis merely illustrative and that such changes may be made, when desired,as allwithin the scope of the appended claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent of the United States the following:

-1. In a mixing nozzle, a member arranged to axially discharge asubstantially cylindricalstream of material, and means dlrecting othermaterial entirely perpendicularly into said stream at a point adjacentits point of exit from said member, and from all sides of the stream.

2. In a mixing nozzle, a member providing a passage for the axialdischarge of a cylindrical stream of material, and means directingmaterial from another stream of'material entirely perpendicularly intosaid first stream. from all sides thereof and toward a common. pointbeyond saidA member.

3. Ina mixing nozzle, a tubular member providing' a passage for axiallydischarging a stream of material, a second member ixedly related to saidfirst member and providing a passage for al second stream of material,and means carried by said second member operative to direct the materialfrom its stream entirely perpendicularly into the first stream adjacentits point `of emergence from its passage and from all sides of saidfirst stream'in a plane at right-angles to the axis thereof.

In testimony whereof, I aiiix my signature.

- PAUL L. GEER.

